CN112775616A - Ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration - Google Patents
Ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration Download PDFInfo
- Publication number
- CN112775616A CN112775616A CN201911091768.3A CN201911091768A CN112775616A CN 112775616 A CN112775616 A CN 112775616A CN 201911091768 A CN201911091768 A CN 201911091768A CN 112775616 A CN112775616 A CN 112775616A
- Authority
- CN
- China
- Prior art keywords
- longitudinal
- ultrasonic
- torsional composite
- rolling
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
- B23P9/04—Treating or finishing by hammering or applying repeated pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses an ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration. The longitudinal-torsional composite amplitude transformer and the sandwich type piezoelectric ceramic transducer are connected through the stud to form an ultrasonic vibrator, the ultrasonic vibrator is fixed in the inner cavity of the knife handle through the hexagon socket head cap screw, and a lead welded on the vibrator transducer is connected with an external ultrasonic power supply through a lead-out hole at the tail part of the knife handle; the threaded hole of the small end face of the amplitude transformer is connected with the threaded hole in the end face of the jacking shaft through the double-end stud, the jacking shaft is in threaded connection with the retaining sleeve, and the requirement for machining workpieces with different apertures can be met by replacing the rolling mechanism. The invention has compact structure and good universality, and the high-frequency vibration of the longitudinal-torsional composite can cause the inner surface of the workpiece to generate violent plastic deformation under smaller static pressure, so that the phenomenon of grain refinement occurs, residual compressive stress is formed on the surface layer of the workpiece, the surface roughness is greatly reduced, and the surface integrity of the workpiece is obviously improved.
Description
Technical Field
The invention relates to a rolling device for inner hole parts, in particular to an ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration.
Background
With the rapid development of industries such as aerospace, high-speed trains, high-end machine tools and the like, higher and higher requirements on the fatigue resistance of workpieces are provided. The traditional rolling strengthening technology can generate larger friction force at the contact area of the roller and the surface of the part, so that the secondary surface of the part is scratched, the roller is quickly abraded, the processing efficiency is low and the like.
Ultrasonic impact and static load rolling are combined to carry out strengthening treatment on the metal parts. In the processing process, due to the high-frequency ultrasonic effect, the inner surface of the workpiece is separated from the roller, the circulation capacity of the cooling liquid in a rolling area is improved, and the severe rolling environment is improved. The ultrasonic vibration impact and the static pressure act on the roller together, so that the surface of the part is continuously strengthened, the surface structure is continuously optimized, beneficial residual compressive stress is formed on the sub-surface of the part, the surface integrity of the part is obviously improved, and the service life of the workpiece is prolonged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration, and aims to solve the problems of poor surface integrity, uneven residual stress and low machining efficiency of a workpiece in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: an ultrasonic rolling inner hole surface strengthening device based on longitudinal-torsional composite vibration comprises an ultrasonic vibration system, a central height adjusting mechanism and a rolling mechanism; the ultrasonic vibration system comprises a longitudinal-torsional composite amplitude transformer, a sandwich type piezoelectric ceramic transducer, a knife handle and an ultrasonic power supply; the longitudinal-torsional composite amplitude transformer and the sandwich type piezoelectric ceramic transducer are connected through the stud to form an ultrasonic vibrator, the ultrasonic vibrator is fixed in the inner cavity of the knife handle through a flange plate, and a lead welded on the transducer is connected with an external ultrasonic power supply through a wire outlet hole at the tail part of the knife handle; the rolling mechanism comprises a roller, a jacking shaft, a retaining sleeve and a butting nut; the jacking shaft is in threaded connection with the retaining sleeve, one end of the retaining sleeve is provided with a jacking nut for stopping, and a threaded hole arranged on the small end face of the amplitude transformer is connected with a threaded hole of the jacking shaft through a stud; the central height adjusting mechanism comprises a wedge-shaped upper block and a wedge-shaped lower block; the cutter handle base is connected with the wedge-shaped upper block through a bolt, and the wedge-shaped lower block is fixed on a cutter head base of the lathe through a bolt.
The longitudinal vibration direction of the longitudinal-torsional composite amplitude transformer is along the axial direction of the amplitude transformer, the torsional vibration direction of the longitudinal-torsional composite amplitude transformer reciprocates along the circumference of the amplitude transformer in a loop mode, the ultrasonic vibration with the same frequency enables the roller to form an elliptical motion track in space, the speed is decomposed into two component speeds which are perpendicular and parallel to a workpiece, and the component speeds are mapped to a surface tissue of the workpiece to generate positive stress and shear stress, so that the sub-surface of the part is subjected to grain refinement, and the high-frequency longitudinal-torsional composite vibration enables the roller to generate ironing pressure on the inner surface of the workpiece.
Eight roller holes are formed in the circumferential direction of the retaining sleeve, and the rollers are assembled in the roller holes in a thermal expansion mode.
The retaining sleeve is axially provided with four internal cooling holes, and cooling liquid enters the internal cooling holes and is sprayed to the rolling area through the inclined hole at the tail part.
The rolling mechanism can be replaced, and the processing requirements can be met only by replacing the corresponding rolling mechanism for rolling inner holes with different sizes.
The central height adjusting device is composed of two wedge blocks, a wedge lower block is connected with a lathe, a wedge upper block is connected with a cutter handle base, the position of the wedge upper block is slid, the axis of the rolling mechanism is adjusted to be coincident with the axis of a workpiece, and the relative positions of the upper block and the lower block are fixed through bolts.
The sizes of the connecting end surfaces of the top shaft and the amplitude transformer are the same, and the connecting surfaces are required to be tightly matched and smoothly transited.
The invention has the beneficial effects that:
1. based on the principle of longitudinal-torsional composite vibration, in the rolling process, the longitudinal-torsional composite high-frequency vibration enables the surface of the material to be impacted by an external load in a high-frequency repeated mode, so that the inner surface of a workpiece can generate severe plastic deformation under small static pressure, coarse grains on the surface generate a nanocrystallization effect, the microhardness and residual compressive stress of the surface layer of the workpiece are obviously improved, and the bearing capacity, the fatigue resistance, the wear resistance, the corrosion resistance and the like of the inner surface of the part are improved.
2. The invention causes the separation phenomenon of the surface of the roller and the inner hole part under the ultrasonic high-frequency vibration, the cooling liquid enters the gap between the roller and the inner surface of the workpiece in the separation period, the cooling and lubricating effects are improved, the contact area of the roller and the surface of the workpiece is greatly increased in unit time, the severe environment in rolling is effectively improved, the surface roughness is reduced, the service life of the roller is prolonged, and the processing efficiency is improved.
3. The invention has the advantages of reasonable and compact structural design, small occupied space, simple operation, low cost, strong universality, easy popularization and implementation and good economic benefit.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic rolling internal hole surface strengthening device based on longitudinal-torsional composite vibration.
Fig. 2 is a second schematic structural diagram of an ultrasonic rolling inner hole surface strengthening device based on longitudinal-torsional composite vibration.
Fig. 3 is a schematic structural view of a longitudinal-torsional composite amplitude transformer.
Fig. 4 is a schematic view of a retainer.
FIG. 5 is a schematic view of a tool shank configuration.
Fig. 6 is a schematic view of the top shaft structure.
Detailed Description
Reference numerals in the drawings of the specification include: 1. the device comprises a workpiece, 2, a roller, 3, an internal cooling hole, 4, a retaining sleeve, 5, a longitudinal-torsional composite amplitude transformer, 6, a spiral groove, 7, a sandwich type piezoelectric ceramic transducer, 8, a T-shaped bolt, 9, a lead, 10, internal threads of the retaining sleeve, 11, an abutting nut, 12, a jacking shaft, 13, an internal hexagonal bolt, 14, a cutter handle, 15, a wire outlet hole, 16, an ultrasonic power supply, 17, a wedge-shaped upper block, 18, a wedge-shaped lower block, 19, a flange plate, 20, a front cover plate, 21, sandwich type piezoelectric ceramic, 22, a rear cover plate, 23, a cutter handle base bolt hole, 24, a small end face of the amplitude transformer, 25, a threaded hole, 26, a cutter handle base, 27, a jacking shaft threaded hole, 28, a jacking shaft external thread, 29 and a roller hole.
The following is a specific embodiment of the present invention and further describes the technical scheme of the present invention with reference to the attached drawings: the structural schematic diagram of an ultrasonic rolling inner hole surface strengthening device based on longitudinal-torsional composite vibration is shown in fig. 1 and fig. 2, and the device comprises an ultrasonic vibration system, a center height adjusting mechanism and a rolling mechanism. The ultrasonic vibration system comprises a longitudinal-torsional composite amplitude transformer 5, a sandwich type piezoelectric ceramic transducer 7, a knife handle 14 and an ultrasonic power supply 16; the longitudinal-torsional composite amplitude transformer 5 and the sandwich type piezoelectric ceramic transducer 7 are connected through a stud to form an ultrasonic vibrator, the ultrasonic vibrator is fixed in the inner cavity of the knife handle 14 through a flange plate 19 by an inner hexagon bolt 13, and a lead 9 welded on the sandwich type piezoelectric ceramic transducer 7 is connected with an external ultrasonic power supply 16 through a wire outlet 15 at the tail part of the knife handle 14. The rolling mechanism comprises a roller 2, a top shaft 12, a retaining sleeve 4 and a butting nut 11; the top shaft 12 is connected with the retaining sleeve 4 through a thread, one end of the retaining sleeve 4 is provided with a butting nut 11 for stopping, and a threaded hole 25 arranged on the small end surface 24 of the amplitude transformer is connected with a top shaft threaded hole 27 through a double-end stud. The central height adjusting mechanism comprises a wedge-shaped upper block 17 and a wedge-shaped lower block 18; the cutter handle base 26 is connected with the wedge-shaped upper block 17 through bolts, and the wedge-shaped lower block 18 is fixed on a cutter head base of a lathe through bolts.
The retaining sleeve 4 is circumferentially provided with eight roller holes 29, and the rollers 2 are assembled in the roller holes in a thermal expansion mode; four inner cooling holes 3 are axially distributed on the retaining sleeve 4, cooling liquid enters the inner cooling holes 3 and is sprayed to the rolling area through the inclined holes at the tail part, and the cooling liquid enters the rolling area between the roller 2 and the surface of the workpiece 1 in the separation period under the ultrasonic action, so that the cooling and lubricating effects are improved.
When in processing, the workpiece 1 is placed on a three-jaw chuck to be clamped, the position of the wedge-shaped upper block 17 is slid, the central height of the device is adjusted by the superposition of the axis of the top shaft 12 and the axis of the workpiece 1, and the rolling mechanism is fed into the inner cavity of the workpiece 1; during processing, the ultrasonic power supply 16 is adjusted to the resonant frequency, the workpiece 1 rotates along with the spindle of the lathe, and the rolling mechanism performs feed motion.
In order to prevent the loosening of the thread of the workpiece 1 during rotation, the rotation direction of the workpiece 1 is required to be consistent with the rotation direction of the retaining sleeve internal thread 10, and the rotation direction of the top shaft external thread 28 is required to be the same as that of the top shaft threaded hole 27.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiment according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (5)
1. An ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration are characterized in that: the device comprises an ultrasonic vibration system, a center height adjusting mechanism and a rolling mechanism; the ultrasonic vibration system comprises a longitudinal-torsional composite amplitude transformer, a sandwich type piezoelectric ceramic transducer, a knife handle and an ultrasonic power supply; the longitudinal-torsional composite amplitude transformer and the sandwich type piezoelectric ceramic transducer are connected through the stud to form an ultrasonic vibrator, the ultrasonic vibrator is fixed in the inner cavity of the knife handle through a flange plate, and a lead welded on the transducer is connected with an external ultrasonic power supply through a wire outlet hole at the tail part of the knife handle; the rolling mechanism comprises a roller, a jacking shaft, a retaining sleeve and a butting nut; the jacking shaft is in threaded connection with the retaining sleeve, one end of the retaining sleeve is provided with a jacking nut for stopping, and a threaded hole arranged on the small end face of the amplitude transformer is connected with a threaded hole of the jacking shaft through a stud; the central height adjusting mechanism comprises a wedge-shaped upper block and a wedge-shaped lower block; the cutter handle base is connected with the wedge-shaped upper block through a bolt, and the wedge-shaped lower block is fixed on a cutter head base of the lathe through a bolt.
2. The ultrasonic rolling inner hole surface strengthening method and device based on the longitudinal-torsional composite vibration as claimed in claim 1, characterized in that: the longitudinal vibration direction of the longitudinal-torsional composite amplitude transformer is along the axial direction of the amplitude transformer, the torsional vibration direction of the longitudinal-torsional composite amplitude transformer reciprocates along the circumference of the amplitude transformer in a loop mode, the ultrasonic vibration with the same frequency enables the roller to form an elliptical motion track in space, the speed is decomposed into two component speeds which are perpendicular and parallel to a workpiece, and the component speeds are mapped to a surface tissue of the workpiece to generate positive stress and shear stress, so that the sub-surface of the part is subjected to grain refinement, and the high-frequency longitudinal-torsional composite vibration enables the roller to generate ironing pressure on the inner surface of the workpiece.
3. The ultrasonic rolling inner hole surface strengthening method and device based on the longitudinal-torsional composite vibration as claimed in claim 1, characterized in that: eight roller holes are formed in the circumferential direction of the retaining sleeve, and the rollers are assembled in the roller holes in a thermal expansion mode.
4. The ultrasonic rolling inner hole surface strengthening method and device based on the longitudinal-torsional composite vibration as claimed in claim 1, characterized in that: the retaining sleeve is axially provided with four internal cooling holes, and cooling liquid enters the internal cooling holes and is sprayed to the rolling area through the inclined hole at the tail part.
5. The ultrasonic rolling inner hole surface strengthening method and device based on the longitudinal-torsional composite vibration as claimed in claim 1, characterized in that: the rolling mechanism can be replaced, and the processing requirements can be met only by replacing the corresponding rolling mechanism for rolling inner holes with different sizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911091768.3A CN112775616A (en) | 2019-11-11 | 2019-11-11 | Ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911091768.3A CN112775616A (en) | 2019-11-11 | 2019-11-11 | Ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112775616A true CN112775616A (en) | 2021-05-11 |
Family
ID=75750052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911091768.3A Pending CN112775616A (en) | 2019-11-11 | 2019-11-11 | Ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112775616A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736967A (en) * | 2021-09-07 | 2021-12-03 | 燕山大学 | Method for strengthening inner surface of pipe fitting by ultrasonic-assisted rolling |
| CN114505508A (en) * | 2022-03-07 | 2022-05-17 | 深圳己道科技有限公司 | Inner-cooling ultrasonic knife handle |
| CN116536493A (en) * | 2023-06-27 | 2023-08-04 | 集美大学 | Small hole strengthening device and wire feeding guide hole machining method using same |
-
2019
- 2019-11-11 CN CN201911091768.3A patent/CN112775616A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736967A (en) * | 2021-09-07 | 2021-12-03 | 燕山大学 | Method for strengthening inner surface of pipe fitting by ultrasonic-assisted rolling |
| CN114505508A (en) * | 2022-03-07 | 2022-05-17 | 深圳己道科技有限公司 | Inner-cooling ultrasonic knife handle |
| CN116536493A (en) * | 2023-06-27 | 2023-08-04 | 集美大学 | Small hole strengthening device and wire feeding guide hole machining method using same |
| CN116536493B (en) * | 2023-06-27 | 2023-08-29 | 集美大学 | Small hole strengthening device and wire feeding guide hole machining method using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112775616A (en) | Ultrasonic rolling inner hole surface strengthening method and device based on longitudinal-torsional composite vibration | |
| CN106424836A (en) | Axial ultrasonic vibration drilling device fixed by lathe carriage | |
| CN116038236A (en) | Device and method for rolling inner hole surface assisted by ultrasonic vibration | |
| CN101220406A (en) | Executing agency and processing method for half wave length ultrasonic surface rolling process | |
| CN109175913B (en) | Method for processing MAN series marine low-speed diesel engine crosshead pin | |
| CN101559498B (en) | Ultrasonic metal surface machining cutter | |
| CN210967707U (en) | Ultrasonic rolling inner hole surface strengthening device based on longitudinal-torsional composite vibration | |
| CN114083225A (en) | Strong rolling and ultrasonic rolling composite strengthening method and machine tool for high-strength steel torsion shaft | |
| CN113231703A (en) | Self-adaptive tool cathode and complex internal channel electrolytic finishing method | |
| CN214444306U (en) | Device for rolling surface texture based on ultrasonic vibration | |
| CN110588228B (en) | Device and method for processing inner surface texture of sliding bearing of marine diesel engine | |
| CN208514142U (en) | Clutch can vehicle shape positioning device | |
| CN101249620A (en) | Rotating ultrasonic chief axis straight thread and conicity composite locating | |
| CN102658454A (en) | Supersonic machining method of circular-arc face of engine valve | |
| CN206343976U (en) | Diameter 20mm cylindrical outer surface ultrasonic honing equipments | |
| CN202894679U (en) | Ball type ultrasonic finishing tool bit | |
| CN113477959A (en) | Low-frequency vibration turning tool handle and cutting machining method | |
| CN110883497B (en) | Self-lubricating formula supersound rolling press device of instrument bandeau microarray structure | |
| RU2384397C1 (en) | Procedure for centrifugal strengthening of screws | |
| CN110681877B (en) | Parallel and spiral groove combined type single-excitation three-dimensional curved surface ultrasonic auxiliary turning device | |
| CN201291393Y (en) | Supersonic wave metallic face machining cutter | |
| CN205551911U (en) | Portable supersound drive press polish sword | |
| CN211360687U (en) | Boring cutter with replaceable cutter head for machining small-bore circular hole inner cavity with steps | |
| CN110871370A (en) | Ultrasonic vibration auxiliary abrasive belt grinding equipment | |
| RU129439U1 (en) | BORED CORRECTION |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |